I dunno, I just feel like the latest advancement I've seen was a VR casino game which looked super cool, but couldn't win real money anyway.
I don't know what kind of innovation you're referring to, the bonuses are basically always the same, weekly and welcome.
Games change graphics change characters but they are those, if you want to try something exciting, I read a few days ago a post where there is a casino where in live the girls in addition to letting out the numbers, they also let out the tits.

To tell the truth, I'm very curious. I visited the site out of curiosity, but registration is required, so I curbed my curiosity.
Even if it's too much, I see this as a nice innovation for lovers of the genre.